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Theoretically possible, though it's more likely his instrumentation malfunctioned at high subsonic speeds, giving the illusion of exceeding Mach 1.Question: Could Hans-Quido Mutke have actually been the first to break the sound barrier on April 9, 1945, in his Me 262?
What muzungu said. For comparison, it moves away about as fast as your fingernails grow. That's slow, but since it's been around for a few billion years, it's original size would have been enourmous. I wish I could have seen the first Moon-riseWC, is it true the moon is moving away from the earth? If so how much per year? And is it a constant? Thanks.
Weeeell... there are two problems with that. First, I'm pretty sure I lack most of the mathematical background needed to understand something like that.
Second, even if I do have the background, I'm a little equation-blind. I.e. I find it quite difficult to figure out written mathematics. I get - and really enjoy - maths if I have a teacher, but give me a maths textbook, and my brain just doesn't process the formulae.
WC, is it true the moon is moving away from the earth? If so how much per year? And is it a constant? Thanks.
The Moon recedes by approximately 33mm per year, which in turn lengthens the day by about 25ms per year. This aren't constant, however; these figures are double what they were about half a billion years ago.WC, is it true the moon is moving away from the earth? If so how much per year? And is it a constant? Thanks.
Cool! (Now I need to figure out if I can get it)According to Penrose the formulas are there just to show you. He alleges that he will explain them properly. I don't think he does, however I could be stupid, or overly pedantic. There is really good parts of the book that you don't need to understand the equations to understand the meaning and for just this I would recommend the book.
So good to know I'm not alone.Unless it is my own equation it takes me days/weeks to understand a formula. That is at best, somethings it takes way longer or never.
Well, I got 6/7 in IB Higher maths, so I never thought I was bad at it. My learning style is just not well suited to studying it from booksI'm, apparently, actually good at maths compared to other academics in my research group and department. Not understanding maths is not a sign that you are bad at it, it is just I sign that you are thinking about it. Which is a good thing IMO.
Yes - the Moon was useful, but not imperative. There could be planets whose chemistry is far more conducive to life and allows for more rapid evolution, so 'normal' asteroid bombardment wouldn't be as lethal as it is to Terran life.Could life have evolved on earth without the moon to act as an impact shield?
My learning style is just not well suited to studying it from books
Interesting observations.For example the difference between my understanding and notation of Maxwell's equations** and that of say Wiccan_Child would be very measurable.
Haha, I'm with you on that one. Vectors are neat.I would go for the sensible vector notation, he would probably be using tensor notation which is gibberish.
Maybe not as much as physicists, but it's far from insignificant. For example, many people in evolutionary biology and ecology play with mathematical models. I don't, but I've tried to understand the theory behind phylogenetic analysis, since phylogenies are fairly important in evo-devo... let's just say that after wrestling with what was supposed to be a great textbook on the theory, I settled for an informal understanding*I believe you are a biologist which means you are kinda screwed. As far as I know there are no maths books for biologists. Cos biologists don't do maths as much.
** James Clerk Maxwell was the greatest physicist that ever existed. He unified electricity and magnetism. Just felt that needed to be said.
Yes, I believe in the Big Bang theory. It's worth mentioning that it doesn't, and isn't meant to, explain the origin of the universe, merely what it's been doing for the past 13.5 billion years. For all we know, the universe could be trillions of years old.Do you believe in the big bang theory? Or do you have a different explanation of how the universe came to be?
Maybe not as much as physicists, but it's far from insignificant. For example, many people in evolutionary biology and ecology play with mathematical models.
I believe you are doing a doctorate? That you are a training academic, right? If you are not I sorry for what I am about to say*:I don't, but I've tried to understand the theory behind phylogenetic analysis, since phylogenies are fairly important in evo-devo... let's just say that after wrestling with what was supposed to be a great textbook on the theory, I settled for an informal understanding
Yes, I believe in the Big Bang theory. It's worth mentioning that it doesn't, and isn't meant to, explain the origin of the universe, merely what it's been doing for the past 13.5 billion years. For all we know, the universe could be trillions of years old.
What muzungu said. For comparison, it moves away about as fast as your fingernails grow. That's slow, but since it's been around for a few billion years, it's original size would have been enourmous. I wish I could have seen the first Moon-rise
No, this is not correct. All it means is that at this point in time we do not have knowledge to know what happened before time zero. Science is a never ending endeavour of finding answers to questions, of understanding all that comprises our physical world.Then there is really no way of ever knowing the original origin, Scientifically speaking. Because we can only go back to the last bang. Is that fair?
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